Spliced reinforcing-bar.



E. E. SLICK.

SPLIGED REINFORGING BAR.

APPLIOATION FILED 001e, 1913.

1,109,258, Patented Sept 1,1914.

INVENTOR WITNESSES 7 v concrete 'remforcmg bars, which bars are f strn'ras PATENT onrion.

EDWIN n. sucx, or wns'ruom' nononen', rnmrsrnvanm SPLIGEID REINFORCING-BAR."

Specification of Letters Patent.

' j v Application filed October 6, 1913 Serial No. 793,500.

To all whom it may concern:

Be it known that I, EDWIN E. suck, a citizen of the United. States, residing in the borough of Westmont, in the county of Cambrie and; State of Pennsylvania, have invented certain new and useful Improvements in Spliced Reinforcing-Bars; and I do hereprovided-"with alternating projections and I depressionsada'pted to fit into or interlock with each other. When the bars are placed v overlapping,the projections of one bar fit imposition with comparatively short lengths into the depressions of the adjacent bar, and

l I secure the bars firmly together by means of a clamp. formed of one piece of metal which surrounds both bars neatly with a space at one end between the said clamp and the adjacent bar adapted to receive a metal wedge. This metal wedge is then driven firmly between the outer surfaces of one of the bars and the adjacent interior surface of the clamp in such. a way as t lock the two bars firmly together. By reason of the interlocking of the bars, the form and dimensions of the surrounding clamp and the action of the wedge, the :IOIIBCtlOIIS of one bar are forcibly pressed into the depressions of the other bar n such a way that the stresses of tension in: said bars, when in service, will be resisted by"the interlocks which are firmly held to- ,At

gether by the clamp and wedge, and in addition .the large amount of friction induced by the pressure of the wedge and the stresses oftensionadds materially to the strength of the joint. In this way I am enabled to' pro- 'vide a very. simple form of splice for bars of the character described, so that the spliced ends will be ofstren'gth greater than that of the body, ofeither bar, which is a desidera-.

tit-in constructions of this character.

' Ordinarily concrete reinforcing bars are "overlapped for splicing to an amount equal invention relates-to spliced reinforcingin metal. concrete constructions or what is- .trated herein. J *"however, is adapted to other forms of reinthis is insiiflicient to develop the strength of. the bars, whereas by means of my splice, an overlap of eight or ten times'the diameter of the bar suflices to make the splice fully equal to, or of greater strength than, the bar. This splice may be applied to shorter bars in locations, where desired, but isparticularly useful in cases where bars are needed of lengths longer than those generally available. Concrete reinforcing-bars are usually furnished in comparativel short lengths, and extreme lengths which are known as carload lengths, namely :--from thirty to to about forty diameters of the bar, and even PatentedSept.1,1914

forty feet, and neither of these are adapted for constructions requiring longer lengths.

This difiiculty, however, is obviated by means of my spliced construction whereby bars may be joined together to furnish any lengths desired, andthe joints in the same will be of strength greater thanthat of the body of the bar. I My construction is particularly adapted to bars having a centra body portion and a plurality of flanges projecting beyond the body portion, which flanges are curved or corrugated in the direction of their projec- -tions, theopposite edges of each pair of con rugated flanges being parallel to each other, whereby the projections on each bar will neatly fit the depressions of a companion bar of the same kind. This form of concrete reinforci-ng bar is covered by my Patent No. 882,27 3, granted March 17th, 1908, and illus- My spliced construction,

forcing bars and particularly to those which -have alternating projections and depressions on their surfaces adapted to contact or interlock with corresponding depressions or projections on the companion bar of similar outline.

Having thus given this general description of my invention, I will now, in order to makethe same more clear, refer to the one sheet of drawings accompanying and forming part of this specification and in which like figures refer to like parts.

Figure 1' is a side elevation of a pair of overlapping reinforcing bars spliced accord- 7 ing to my invention, each of said bars-haw ing alternating projections and depressions adapted to fit and interlock; the depressions on one side of each of said bars are opposite correspondingly shaped projections ion the same side of the said bars; while on the other side of each of said bars the projections are opposite the depressions of the other side and the depressions are correspondingly opposite the projections of the other side. The view of one side of each of said bars, therefore, presents an undulating or waved appearance, the exterior lines of which are parallel to each other, while the other side presents a similar appearance, with the exception that the locations of the projections and depressions are staggered with respect to the side first mentioned. Fig.2 is a cross sectional elevation taken on the line II-I I of Fig. 1. Fig. 3 is a view similar to Fig. 2 with the exception that the wedge is of slightly different form. Fig. 4 is a view similar to Figs. 2 and 3 with the exception that the wedge has a different form. Fig. 5 is a side elevation of a pair of overlapping reinforcing bars spliced according to my invention, the clamp being shown in central vertical section for the sake of clearness of illustration. It will be noted that the reinforcing bars shown in Fig. 5 are slightly different from those shown in Fig. 1, in that the projections and depressions on the two sides of each bar are directly opposite each other, instead of being staggered. Fig. 6 is a transverse vertical section on the line VIVI of Fig. 5.

Referring now to the characters of reference on the drawings: 1-1 indicate reinforcing bars, each provided with alternating projections and depressions adapted to fit together and interlock when one is superimposed upon the other as shown.

22 are projections; 3-3 are the depressions. These projections and depressions are preferably formed, as shown in side elevation in Figs. 1 and 5, as continuous curves giving a sinuous or wave-like appearance to the bar, the outline of the projections being similar to that of the depressions, so that the projections will fit into the depressions "of a companion bar and the spacing of the said projections and depressions is substantially thesame so that the bars will interlock as shown. The projections and depressions, however, may be made in other forms than shown, and may be bounded by straight lines, or a combination of straight lines and curves, as will be readily understood by one skilled in this art.

The projections 2 are disposed on the outer edges of the bar, thereby forming a groove therein indicated as 4.

5 indicates generallya clamp which is formed integrally of metal, shown in this case as of rectangular outline. I prefer to make this clamp from a bar of flat iron or steel, cut to the length desired, with a hole formed in the center thereof by punching,

either cold or hot, as may be desired. This, therefore, forms a clamp of integral metal provided with side portions 6--6 which are I adapted to withstand the tensicnal and bending stresses of the clamp when in use, and end portions 77, which in connection with the sides 66 are adapted to withstand the shearing stresses and the slight amount of bending produced by the pressure of the wedge an the stresses due to the tension of the bars in use.

The lower end surface of the clamp 5 is indicated as 8, which surface contacts with the external surface of the bar adjacent thereto, while the opposing interior end surface of the clamp is indicated as 9 which is adapted to contact with the adjoining surface of the wedge which is driven against it.

As shown in Figs. 1 and 2, 10 represents a wedge, the width of which is substantially equal to that of the bars 1-1 and is adapted to be inserted in the opening provided therefor between one of the said bars and the adjacent interior end surface 9 of the clamp 5. These wedges are preferably formed of hard metal and with comparatively slight taper so that the frictional resistance between the wedge, the clampand the bar is sufiicient to hold the same securely together when the wedge is forcibly driven into position.

As shown in Fig. 3, the wedge is formed with the portion 11 of substantially rectangular cross section and with an integral lower portion 13 which is adapted to fit into and contact with the surface of the groove 4 in the bar 1, in addition to which, the Wedge has lower side surfaces 12- 12 which are adapted to contact with the outer portions of the projecting surfaces 9.2 of the bars.

As shown in Fig. 4, the wedge is provided with an upper portion 14 of substantially rectangular cross section with an integral taper portion 15 below the'saine adapted to contact only with that portion of the bar 1 which is formed by the sides of the groove 4 therein; the upper surface of the said wedge contacting with the upper interior end surface of the clamp 9 as before. The

form of the wedge illustrated in F ig. 5 is the same as that illustrated in Fig. 3, having an upper portion 11, the upper surface of which is adapted to contact with the interior end surface 9 of the clamp 5, and in addition is provided with a downwardly extending integral projection or tongue 13 adapted to fit in the groove 4 of the bar, while the lower surface 12 of the upper portion of said wedge also contacts with the outer Is)urfaces of the projecting portions 2 of the Although I have shown and described my improvements in considerable detail, I do not wish to be limited to the exact and specific details shown and described, but may use such substitutions, modifications or saidbars so as to me'nt, and a-wed coiiperating clam andbars-a aptedto hold them firmly -'1'ntegralmetal clamp'surroun "adapted to'contact with the parallel sides equivalents thereof, as are embraced within the scope of my invention, or as pointed out in the claims. a

' Having thus described my invention, what 5' #1 claim and desire to secure by Letters Patent is:

1. A- pair of metal reinforcing bars, at least one of two op osite sides of each being provided with a p uralitv of sinuous projections and depressions fitted together and adapted to prevent relative longitudinal movement of said bars, an integral metal clamp surroundin said bars, adapted to contact withthe ot er sides of said bars and one of the first mentioned sides of one of revent the relative lateral displacement 0 said bars, thereby serv' ing to hold the interlocking projections and depressions ofthe ,two'bars 111, close engagev with said toget er. l

sinuoov'e between said rows of rejections, an said bars thereofand the'outer surfaeesiof one of the the corrugated fiang'es aforesai with the ot sinuous sides of one of said bars and thereby hold them in relative interlocking relation, a wedge inserted between one 0 said bars and the clamp, said wedge being provided with a flat surfaceon one side adapted to contact'with the interior end surface of said clamp, the opposite Side of said wedge having flat surfaces near the edges and a projectin rib between thesame adapted to fit into an contact with the surface of the groove in said bars.

3. A pair of concrete reinforcing bars,

each havin a central body portion and a plurality o flanges roject' from two opposite sides .beyon the b y portion, at least two of said flanges being corrugated in the direction of eir projection and the edgesofthe corrugate flangesflbeing paralle the ends of said bars overlapping and interlocking longitudinally 13y means 0 a clamp compri'smg an integral perforated piece of 'metal adapted to surround and to contact.

er sides of said bars so as to prevent the relative lateral displacement of said bars, thereby serving to hold the interlock- I mg projections and depressions of the two bars in close engagement, and a wedge insorted between sai clamp and the surfaces of one of the said bars.

In testimon whereof I hereto afiix m signature; in t e presence of two witnesses.

Witnesses:

' 'Gao. E. Tmcmr,

Pam F. Lonesnonn.

mien; this patent may he obtained for live cents. each, by addressing the commissioner of Patents,

, 4 k v wu z in c EDWIN E. SLICK, t 

